The Federal Association of German Railway Friends (Bundesverband Deutscher Eisenbahn – Freunde e.V.) published best practices as guidelines for modellers of German railways. These best practices are not part of the the MOROP NEM standards; thus, modellers are not obligated to adopt them.
Having said that, I read through their best practices and would adopt them on my layout. In particular, this best practice on platform and ramp constructions took into account the existing NEM 102 loading gauges/clearances. Additional clearances were recommended for platforms located at curves (NEM 103).
Not all platforms are the same. Depending on its purposes and traffic, passenger platforms have various heights. That explains why at some stations, additional assistance were given to climb onboard or off the trains.
The minimum width of each platform differs depending on their location at a particular station.
I hope you find these information helpful.